San Pedro River – through a geologist’s eyes

The San Pedro River at Fairbank

The San Pedro River at Fairbank

The San Pedro River is Arizona’s last undammed river. Joe Cook and his colleagues at the Arizona Geological Survey recently mapped the extent of Holocene channel and floodplain alluvium there. This 122-mile map story from the US-Mexico Frontier to Winkelman, Arizona, shows you the San Pedro River Valley as seen through the eyes of a geologist.

View the story map of the San Pedro River!

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